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临界连续模式下高功率LED驱动电源谐振控制方法
引用本文:郑则炯,张华. 临界连续模式下高功率LED驱动电源谐振控制方法[J]. 电源学报, 2020, 18(4): 123-130
作者姓名:郑则炯  张华
作者单位:广东轻工职业技术学院机电技术学院,广东技术师范大学自动化学院
基金项目:广东轻工职业技术学院2018年“优秀青年基金”项目: 复合滑模控制算法在DC-DC变换器中的研究,课题编号:QN2018-006,项目负责人:郑则炯 广东高校优秀青年创新人才培育项目,名称:海上风电场建设规模的评估指标体系及方法研究,编号:2013LYM_0050
摘    要:针对传统LED驱动电源谐振控制方法电路控制谐波异常导致输出电流过冲、电压稳定控制效果差和时延高等问题,提出了临界连续模式下高功率LED驱动电源谐振控制方法。结合PFC和LLC半桥两种方式,控制LED驱动电源谐振部分的频率变化值,选取开关恒流源,选取FSFR2100集成控制芯片作为控制芯片。在临界连续模式下,计算高功率LED驱动电源电路中电感值、滤波电容,以此为参量依据,设定电路中的电压范围与最小开关频率、输出功率等,校正PFC电路控制谐波。以PFC控制器所计算的电流与电压数据为基础,计算谐振频率值,通过谐振网络部分调整电压增益,确保LED驱动电源开关管实现零电压开关,实现临界连续模式下高功率LED驱动电源谐振控制。实验结果表明,采用该方法进行谐振控制的LED驱动电源,工作效率和PF值分别保持在88%和0.99以上,并且开关损耗低,未出现电流过冲,输入电压与输出电流波形相同,整体控制效果较好。

关 键 词:临界连续模式;高功率;LED驱动电源;谐振控制;零电压开关;电压增益
收稿时间:2019-06-28
修稿时间:2020-06-30

Resonance Control Method for High-power LED Drive Power Supply in Critical Continuous Mode
ZHENG Zejiong and ZHANG Hua. Resonance Control Method for High-power LED Drive Power Supply in Critical Continuous Mode[J]. Journal of Power Supply, 2020, 18(4): 123-130
Authors:ZHENG Zejiong and ZHANG Hua
Affiliation:School of Mechatronics, Guangdong Industry Polytechnic,
Abstract:Using the resonant control method of high power LED drive power supply under critical continuous mode, it can effectively solve the traditional LED drive power supply cannot realize the independent regulation of resonant frequency under critical continuous mode, resulting in the drive power supply cannot achieve the zero voltage switch, and the switch loss is high. This method combines PFC with LLC half-bridge. The PFC controller uses Boost topology method to calculate the power, inductance, and capacitance of the LED drive power supply to correct the PFC circuit. The corrected PFC circuit can be used to input current waveforms. Harmonic control, Synchronize it with input voltage waveform to realize zero voltage switch; The LLC resonant converter is based on the current and voltage data calculated by the PFC controller. After calculating the resonant frequency, the voltage gain is partially adjusted through the resonant network to ensure that the switch tube realizes a zero voltage switch, reduces the switching loss of the LED drive power supply, and realizes high power LED drive power supply. Resonance control. The experimental results show that the operating efficiency and PF value of the LED drive power supply with resonance control are above 88 % and 0.99, and the switching loss is low.
Keywords:Critical Continuous Mode   High Power   LED Driver   Resonance Control   Zero Voltage Switch   Voltage Gain
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